Dude, you created Vitamin Water? I'd PAY you to pick your brain over some food (I probably wouldn't eat).
I think many 20-something entrepreneurs would be very eager to lunch and trade ideas and wisdom with the creator of Vitamin/SmartWater. You're more successful than 99.9% of us, and any ageism takes a far backseat to actual achievements.
Grubwithus occasionally has special dinners with noted authors, entrepreneurs, and personalities of any age. I'm sure if a dinner were focused around you, it would sell out really quickly. You had an exit that dwarfs anything praised around here...